Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14d3c49f9c3c937…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 13:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d9d65ccc01002fcfdba31864683c661c SHA-1: c7898bd8cd32ecbb94a7874dd8446fca1edd0eb8 SHA-256: a14d3c49f9c3c9377037ced0ed7cf0aef92f7eb520acba32f28bc424180fbfac
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wix?keyword=hey+whipple+squeeze+this+5th+edition+pdf+download PDF link annotation
    • http://dobelukurama.22web.org/zipokigowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_600457353db61.pdfIn PDF document text
    • http://eferevole.com/what_plants_are_unique_to_australiat383n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_6028b0eb70dda.pdfIn PDF document text
    • http://elinekici.online/privilege_level_user_account0firg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_603239acda4d6.pdfIn PDF document text
    • http://sell-toclick.online/75426108572iys0a.pdfIn PDF document text
    • http://pagebake.com/whirlpool_cabrio_platinum_washer_troubleshootingnq1qi.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/74071688494.pdfIn PDF document text
    • http://azakalaza3.xyz/harry_potter_book_5_wikiexwx4.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/40469073517.pdfIn PDF document text
    • http://motegolev.22web.org/bennie_and_the_jets_piano_sheet_music_free.pdfIn PDF document text
    • http://milanomoda-italy.site/zetufiwupemepururareduwowjjkga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5fd6a05f45d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445101/normal_600f7800c47ee.pdfIn PDF document text
    • http://vnds-super.space/football_referee_shirtsrcw63.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/81414057797.pdfIn PDF document text
    • http://sun-italy.space/aafp_board_review_questionsefx87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afa825c-2ff0-4b2b-baa6-57db8e5776a9/myron_mixon_simple_brisket_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce82a51-99c0-4f9a-aa98-fe992090c52f/how_are_simple_covalent_bonds_structured.pdfIn PDF document text
    • http://liluratomakawu.rf.gd/67001472980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9250c80-6acc-44a4-a342-5fed50f11089/what_is_research_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ba6af3-ec04-4f78-a371-6439be6c9fd8/resumen_el_hombre_mas_rico_de_babilonia_por_capitulos.pdfIn PDF document text
    • http://xolevusafo.myartsonline.com/funny_love_poems_for_husband_from_wife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1840381-94d6-43ac-951b-a8077244c1d4/10866424759.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE3 5488 bytes
SHA-256: ba5d01663a67c8c2ee3c4455d36a19e76213bf142a3f1cf0c81d4a50cc60c43d
font_01_sfnt_off000100b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 11288 bytes
SHA-256: f2f07dd1b65445aea199a275e0d6a60ff9bfcc2f0d01d0fa995b2f743e8613e2

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